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Cited by 17 publications
(23 citation statements)
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“…The photochemical behaviour of stilbene (S), particularly the trans (E) isomer, within the faujasite zeolite (Y) has been studied in various laboratories [6][7][8][9][10][11]. Direct excitation and triplet sensitization result in geometrical isomerization, the latter process in the matrix being similar to that in solution.…”
Section: Introductionmentioning
confidence: 99%
“…The photochemical behaviour of stilbene (S), particularly the trans (E) isomer, within the faujasite zeolite (Y) has been studied in various laboratories [6][7][8][9][10][11]. Direct excitation and triplet sensitization result in geometrical isomerization, the latter process in the matrix being similar to that in solution.…”
Section: Introductionmentioning
confidence: 99%
“…All the maximum excitation wavelengths of six selected TFBs on cotton fabrics are in the UV range from 360 nm to 370 nm (listed in Table 1), and the energy level transition and photoreaction of TFBs induced by this range of light have been depicted in Figure 2 [8,15,17,[21][22][23][24][25]. The lowest vibrational energy levels of each electronic state are represented by thick horizontal lines, and other horizontal lines indicate higher energy vibrational levels associated with each electronic state.…”
Section: Influence Of Ultraviolet Irradiation On the Light And Perspimentioning
confidence: 99%
“…Subsequently, the TFB +• undergoes irreversible decomposition by O 2 −• or O 2 , leading to loss of fluorescence and whiteness products [17]. In addition, the 3 TFB* cannot only rebuilt the trans-TFB with fluorescence property, but also generate the non-fluorescent cis-TFB, which is richer in energy, by the rotation about central double carbon bond of stilbene in the process of its falling back to the ground state (S 0 ) [24,25]. The electrons in the π orbit of stilbene are easily excited by the UV light and jump into the π* orbit, reducing the order of π bond.…”
Section: Influence Of Ultraviolet Irradiation On the Light And Perspimentioning
confidence: 99%
“…This conclusion is also supported by the result of the experiment that the inhibition effect is enhanced by the increase of the concentration of sodium chloride. 13,41 Meanwhile, according to Lakshminarasimhan's research (Lakshminarasimhan et al 12 and Gertz 28 ), we suppose that the sodium ion (Na + ) will bind to the one of the two phenyl rings in trans-stilbene and form the unusual three-decker structures of diphenyl sandwich-type complex (D-A-D) between the two TFBs (show in Scheme 4). The sandwich-like complex restricts the rotation of the double carbon bond and prevents the isomerization of trans-stilbene to cisstilbene without whitening performance.…”
Section: Impact Of the Components Of Perspiration On Photo-fading Of Tfbsmentioning
confidence: 99%
“…5,8,9 However, due to the double carbon bond (C ¼ C) linkage of stilbene, TFBs have low photo resistance and are prone to exist in two isomeric forms, the trans-isomer with fluorescent and the cis-isomer without fluorescent and brighten ability. 2,[9][10][11][12] Considerable investigations on the photo-yellowing process of TFBs in solution have been carried out. Firstly, the transisomer absorbs the excited energy from the light, which transforms into the cis-isomer, which is richer in energy, and then further photo-cleavage occurs in the presence of water or oxygen (Scheme 1); thus, the fluorescent brightener becomes less effective and the application performance of the textile is affected seriously.…”
mentioning
confidence: 99%